Window-bolt for concrete buildings



. W. SLEIGHT.

. 1920. 1,362,749. Patented Dec. 21, 1920.

UNITED STATES 351cm OFFICE.

WI LIAM W. SLEIGHT, or QHICAGQ, ILLINOIS, nssrs voaro GEORGE 1*. Minnie, or

, CHICAGO, tumors.

' WINDOW-BOLT FOR CONCRETE BUILDINGS.

Specification of Letters Patent.

Patented Dec. 21, 1920.

Application filed. Marchll, 1920. Serial No; 364,877.

To all whom it may concern:

Be itknown that I, WILLIAM NV. Snnrorrr, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in VVindow-Bolts for concrete Buildings, of which the following is a full, clear, and exact description. I

My invention relates to bolts and particularly to bolts that are adapted to be se-- cured to the mullion of window frames and used in connection with the terminal clips of the supportingrope of window washers harness.

I-Ieretofore, when the walls of buildings made of concrete composition were in course of construction, and used bolts of this character, large holes were made in the outer boards of the mold for the accommodation of the head of the bolt and, before the plastic composition was poured or shoveled into the mold and tamped down, the shaft of the bolt was placed in the desired position within the mold with the head thereof in the hole, and retained and reinforced in this position by wires. It was necessary to do this in ordr to prevent the bolt turning sidewise or inclining lengthwise while filling the mold and tamping the material down, and the job generally took a workman an hour to an hour and one half. My invention is designed to overcome this delay and cost of labor and reinforcing work entirely. This I accomplish by the means hereinafter described and as particularly pointed out in the claims.

In the drawings:

Figure 1 is a side view of my invention showing it embedded in a concrete wall from which the mold has not been removed.

Fig. 2 is a top edge view of the same re moved from said wall.

Fig. 3 is a front end view thereof.

In the drawings, A represents a fragment of the outer board of a mold for a concrete wall, B, as shown in Fig. 1 of the drawings.

My improved bolt consists of a vertically flattened shaft 4: whose upper and lower edges are provided with recesses 5 and 6 the rear portions of which terminate more abruptly than the front portions, and whose rear end is provided with corresponding lateral lugs, 7, 7. This shaft extends rearwardly from a circular boss, 8, whose cylindrical edge is provided with fins, 9, 9; one of which projects from its uppermost segment in longitudinal alinem'ent with-the upper edge of said shaft, and one from its lowermost segment, diametrically opposite thereto, andsaid boss 8 isalso provided with less promlnent fins, 10, 10, that project from its clrcumference widway between fins, 9, 9. I The outer side of boss 8 has a head 12 proecting therefrom the neck of which is of less width than the same, and I prefer to elongate this head vertically to an extent corresponding to the diameter of the boss.

In order to properly adjust my improved bolt in the concrete wall, a hole is bored in the outer board of the mold, of a diameter corresponding to that of boss 8, and then the shaft of the bolt is inserted through this hole into the mold, and then, with the head 12 in a vertical position, the boss is driven by ahammer or other suitable means into the hole. As the bolt is driven in its fins cut into the wood surrounding the hole and firmly anchors it in place. When the plastic concrete is poured or shoveled into the mold it surrounds the shaft of the bolt, and so firmly is the boss of the bolt held in the hole in the board that the introduction and tamping of the concrete will not disturb nor change the position of the same.

Another very important feature of my improvement resides in the fact that the bolt will not, with ordinary care, be driven too far into the hole, because the distance between the inner surface of the boss and the outer surface of the head is made to correspond to the thickness of the board, which is usually about seven-eighths of an inch. When driving the bolt into position, a hammer is ordinarily used until the outer surface of the head thereof is flush with the outer surface of the boards.

I do not wish to be confined to the use of four fins, as it is apparent one or more could be used with but very slight, if indeed any, difference in result.

What I claim as new is:

1. A bolt of the kind specified comprising a circular boss, having a fin projecting from its circumference, a shaft projecting from the inner side of said boss, and a vertically elongated head projecting from the front or opposite side of the same, the distance between theinner side of said boss, and the front side of said headcorresponding to the thickness of the boards of a mold for concrete walls through a hole in which said boss is adapted to be driven.

2. A bolt of the kind specified comprising a circular boss having a fin projecting from its circumference, a shaft projecting from the inner side of said boss that has lateral lugs projecting from its inner end, and a vertically elongated head projecting from the front or opposite side of the same, the distance between the inner side of said boss, and the front side of said head corresponding to the thickness of the boards of a mold for concrete walls through a hole in which said boss is adapted to be driven.

3. A bolt of the kind specified comprising a circular boss, a shaft projecting from the inner side of the same, having lateral lugs projecting from its inner end, and a head projecting from the front or opposite side thereof, said boss being of the same diameter as a hole in the board of a mold for concrete walls through which it is adapted to be driven.

In witness whereof I have hereunto set my Witnesses:

VIOLET WARDELL, FRANK D. THOMASON. 

